Quoting from http://www.olywa.net/vtacoma/HD.HTM
"Asiatic ginseng is often associated with its ability to restore life
or its effects on sterility and impotence," so is considered more
valuable in the Orient than American ginseng. Of all Asiatic ginseng,
Korean ginseng is recognized as the best grade, despite the
shape or size of the root. (Facts About Ginseng). In recent years,
Hong Kong has been the major ginseng market , followed by
Singapore and Taiwan. Even during the 1970's ginseng was the
fourth most important agricultural product exported by the United
States to Hong Kong. Of all the ginseng accessible in world
markets, the Korean Panax ginseng has been the one that is most
highly recognized among the dominant consumers, the Chinese.
Because of the healing properties contained in ginseng, six
reported cases were given in the same book, Facts About Ginseng,
The Elixir of Life, by Florence C. Lee.